Powertrain
generic / SAE
P2AD9
Reductant Pump Motor Position Sensor Circuit High
Voltage on the reductant pump motor position sensor signal line is above the expected window. Wire shorted to B+ or sensor open.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / D9
Possible causes
- Signal wire shorted to B+ high
- Open sensor medium
- Connector pins corroded - high contact resistance low
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1000 €
- Estimated time: 1–4 h
- Component: reductant pump motor position sensor
- Component: wiring harness
- Component: scr module
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012